The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2005
Filed:
May. 07, 2004
Masahiro Yatake, Nagano-ken, JP;
Jun Ito, Nagano-ken, JP;
Motoki Masuda, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
This invention provides an water-base ink achieving high print quality on plain, recycled, and coated paper, glossiness on glossy paper, as well as well-balanced gas fastness, and an water-base ink set which exhibits low light source dependence with regard to the colors of resultant printed matter. This invention is an water-base ink comprising a pigment, a surfactant and/or a penetrating organic solvent, and water, wherein the pigment is a copper phthalocyanine pigment substituted with eight or less chlorine atoms; the surfactant is an acetylene glycol surfactant and/or an acetylene alcohol type surfactant; and the penetrating organic solvent is one or more selected from the group consisting of di(tri)ethylene glycol monobutyl ether and/or (di)propylene glycol monobutyl ether, and 1,2-allylene glycol. This invention is also an water-base ink set comprising the water-base ink, a magenta ink and a yellow ink.